First, you need to get an under tank heater and a thermostat to control it. i use cypress mulch as bedding, because it is very dry in my house in winter, and the cypress mulch holds the humidity better. I use 2 hides, one hot side and one cold side hides. Under the hide on the hot side i add a layer of spagnum moss. Just wet the moss and wring it out and spread it out under the hot hide, you have now created a humid hide. When he gos into shed just keep the moss slightly damp, and after the shed just let it dry out. Since it is abattle to keep humidity up in my house because of our wood stove, i also use a reptifogger set on a 6 hour timer when he is in shed. Hope this helps.